Covering for steam pipes



. U ITED STATES PATENT OFFICE.

MARTIN FLEGLE, OF MINNEAPOLIS, MINNESOTA.

COVERING FOR STEAM PIPES, BOILERS, 80C.

J'I PECIFICATI ON forming part ofLetters Patent No. 348,959, datedSeptember. 14, 1886.-

Application filed March 15, 1886.

To all whom it may concern.-

Be it known that I, MARTIN FLEGLE, a oitizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inCoverings for Steam- Pipes, Boilers, &c.,of which the following is aspecification.

My invention relates to a non-conducting covering for pipes, boilers,&c., to prevent radiation of the heat.

The objects of the invention are to provide a covering which isnon-combnstible, which is effective as a non-conductor of heat, andwhich is adapted to permit expansion of the pipes or other surfacescovered without affecting the efficiency of the covering.

My invention is illustrated in the accompanying drawings, in whichFigure 1 shows a section of pipe provided with my improved covering.Fig. 2 is a transverse section on the line a: w of Fig. 1, and Fig. 3 isan end view of one of the tubular coverings for the p p A represents asteam-pipe. B B are tubular sheet-metal coverings for incasing andforming air-spaces around the pipe. The covering is made in sections,preferably about two feet long, and the ends of the sections are placedabout three-eighths of an inch apart. The 'ends I) are slit at frequentintervals, and are crirnped inward at an angle, preferably of aboutsixty to seventy degrees, and the tubular sections are held out from thepipe by these bent ends I). The edges of the sheet metal forming thetubes are held together by anglejoints or in any well-known manner. Thetubular covering should stand out from the pipe sufficiently to form anair-space of about five-eighths of an inch between the pipe andcovering. Surrounding the tubular covering is a non-conductingcomposition, 0, put on in plastic state and allowed to dry and shrink onthe tubular covering about the pipe. The space between the ends of thetubes B is filled with this plastic compound, so that the airspacesformed by the tubes are separated from each other. The bent ends I)being somewhat flexible allow expansion of the pipe A without breakingthe surrounding composite material O.

Any well-known composition adapted to the purpose may be used for thecovering 0; but

'in proper position, the plastic compound is Serial No. 195,354. (Nomodel.)

ter having salt in solution in the proportion of one pound to the gallonof water, and the two mixtures are then combined, and the composition isin a plastic state ready for use. The tubes B having been fitted to thepipe and then spread around the tubes and filled into the spaces betweentheir ends and allowed to dry and make a close fit by shrinkage. Acanvas cover, D, is secured around the outside, and should be painted toexclude moisture.

Ido not herein makeany claim for the compound above described, butreserve the right to claim the same in aseparate application for patentto be filed by me.

WVhat I do herein claim, and desire to se cure by Letters Patent, is-

1. A covering for steam pipes, boilers, 800., comprising disconnectedair-spacing tubessun 8' rounding the surface to be covered,andanonconducting compound ineasing such airspacing tubes and sealingthe ends thereof, sub stantially as set forth.

2. A covering for steam pipes, boilers, 850., comprising separatedair-spacing tubes having inwardly-bent ends fitting around the surfaceto be covered, and a non conducting compound covering said tubes andsealing the ends thereof, substantially as and for the pur- 5 pose setforth.

3. The combination, with a steam-pipe or other surface to be covered, ofthe tubes B, having slit inwardly-bent ends I), and the nonconductingcomposition 0, substantially as and 100 for the purpose set forth.

MARTIN FLEGIJE.

Witnesses: I N. LEWIS,

P. H. GUNOKEL.

